| Abstract: | The wide-angle light scattering (WALS) approach has been utilized for the measurement of soot aggregate sizes (radii of gyration)
in flames on a single-shot basis. Key elements are a pulsed laser and an ellipsoidal mirror, which images the light scattered
within a plane onto an intensified CCD camera, thus allowing for an instantaneous acquisition of a full scattering diagram
with high resolution. Results for a laminar premixed flame exhibit good agreement with averaged data and demonstrate the feasibility
of the method. The applicability of the technique to unsteady combustion processes is demonstrated by measuring aggregate
sizes in a weakly turbulent jet-diffusion flame. In both cases light scattering results are verified by data obtained from
electron microscopy analysis of sampled soot. |
